06-01-14
SECTION 12 24 00
WINDOW SHADES
SPEC WRITER NOTES:
1. Use this section only for NCA
projects.
2. Delete between //---// if not
applicable to project. Also delete any
other item or paragraph not applicable
in the section and renumber the
paragraphs.
PART 1 - GENERAL
1.1 DESCRIPTION
A. //Cloth shades, // vertical blinds // and venetian blinds // are
specified in this section. Window shades must be furnished complete,
including brackets, fittings and hardware.
1.2 RELATED WORK
A. Color of //shade cloth // and // color of exposed parts of venetian
blinds, (including tapes and cords) // and color of vertical blinds //:
Section 09 06 00, SCHEDULE FOR FINISHES.
1.3 QUALITY CONTROL
A. Manufacturer's Qualification:
Provide evidence that the manufacture of
blinds are a major product, and that the blinds have performed
satisfactorily on similar installations.
1.4 SUSTAINABILITY REQUIREMENTS
A. Materials in this section may contribute towards contract compliance
with sustainability requirements.
See Section 01 81 11, SUSTAINABLE
DESIGN REQUIRMENTS, for project // local/regional materials, // lowemitting materials, // recycled content, // _____// requirements.
1.5 SUBMITTALS
A. Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT
DATA, AND SAMPLES.
B. Samples:
1. Shade cloth, each type, 600 mm (24 inches) square, including cord
and ring, showing color, finish and texture.
2. Vertical blind slats, 300 mm (12 inches) long, including chain and
supporting channels, showing color and finish.
3. Venetian blind slats, 300 mm (12 inches) long, including cord and
tape, showing color and finish.
C. Manufacturer's literature and data; showing details of construction and
hardware for:
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1. Cloth and window shades.
2. Vertical blinds.
3. Venetian blinds.
1.6 APPLICABLE PUBLICATIONS
A. Publications listed below form a part of this specification to extent
referenced. Publications are referenced in text by the basic
designation only. Comply with applicable provisions and recommendations
of the following, except as otherwise shown or specified.
SPEC WRITER NOTES:
1. Remove reference citations that do not
remain in Part 2 or Part 3 of edited
specification.
2. Verify and make dates indicated for
remaining citations the most current
at date of submittal; determine
changes from date indicated on the TIL
download of the section and modify
requirements impacted by the changes.
B. American Society for Testing and Materials (ASTM):
A167-99(2009)
Stainless and Heat-Resisting Chromium-Nickel
Steel Plate, Sheet and Strip
B221-13
Aluminum-Alloy Extruded Bars, Rods, Wire,
Shapes, and Tubes
D635-10
Rate of Burning and/or Extent and Time of
Burning of Self-Supporting Plastics in a
Horizontal Position
D648-07
Deflection Temperature of Plastics Under
Flexural Load in the Edgewise Position
PART 2 - PRODUCTS
SPEC WRITER NOTES:
1. Update material requirements to space
with applicable requirements (types,
grades, classes, and other related
items) specified in the referenced
Applicable Publications.
2.1 MATERIALS
A. Shade Cloth: // translucent // opaque.//
B. Staples (For Cloth Window Shades): Nonferrous metal or zinc-coated
steel.
C. Stainless Steel: ASTM A167.
D. Cords for Venetian Blinds: No. 4 braided nylon or No. 4-1/2 braided
cotton having not less than 175 pounds breaking strength.
E. Extruded Aluminum: ASTM B221.
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2.2 VENETIAN BLINDS
A. 50 mm (2 inch slat) // Type II, 25 mm (1 inch slats) // fabricated of
aluminum. Pre-production sample is not required.
2.3 VERTICAL BLIND LOUVER BLADES
A. Rigid polyvinyl chloride, light stable, not less than 0.6 mm (0.025
inch) thick, 90 mm (3-1/2 inches) wide, and with beaded edges on each
side of not less than 1.2 mm (0.050 inch).
B. Louvers to withstand 80C (180 degrees F) head chamber for thirty
minutes without distortion, shrinkage, or stretching for no more than
one half of one percent as tested by ASTM D648.
C. Louvers to be opaque and of plain finish, and permanently flame
retardant as tested by ASTM D635.
2.4 FASTENINGS
A. Zinc-coated or cadmium plated metal, aluminum or stainless steel
fastenings of proper length and type.
B. Except as otherwise specified, provide fastenings for use with various
structural materials as follows:
Type of Fastening
Structural Material
Wood screw
Wood
Tap screw
Metal
Case-hardened, selftapping screw
Sheet Metal
Screw or bolt in
expansion shields
Solid masonry
Toggle bolts
Hollow blocks,
wallboard and plaster
2.5 FABRICATION
A. Fabricate // cloth shades // venetian blinds // vertical blinds // to
fit measurements of finished openings obtained at site.
B. Cloth Window Shades:
1. Rolling type, constructed of shade cloth mounted on rollers.
2. Shade cloth to have plain sides, and with hem at bottom to
accommodate wood slat.
3. Separate shades are required for each individual sash within
opening.
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4. Length of shades to exceed height of window approximately 300 mm (12
inches) measured from head to sill, in addition to material required
to make-up hem:
a. Provide rollers with spindles, nylon bearings, tempered steel
springs, and all other related accessories required for positive
action.
b. Provide rollers of diameter recommended by shade manufacturer.
c. Staple shade cloth to wood rollers to prevent wrinkling or
folding, and on line parallel to axis of rollers so that shade
will hang plumb.
d. Space staples not over 90 mm (3-1/2 inches) on centers. Use of
tacks is prohibited.
e. Wood slats to be smooth, tapered, and inserted in the bottom hem
of the shade cloth.
f. Eyelets to have clear openings large enough to accommodate cords;
edges of eyelets must not cut into cloth when set.
g. Cords to be of sufficient length to permit shades to be drawn to
bottom of opening with ends looped and held with cord rings.
Attach cords to hems through metal eyelets in center of slats in
bottom hems.
C. Venetian Blinds:
1. Venetian blinds to have // 25 mm (1 inch) // 50 mm (2 inch) // width
horizontal slats positioned within ladder tapes.
2. Multiple blinds in openings are to be of same type and divided at
mullions.
3. Head-rails to fully enclose operating mechanism on three sides and
ends.
4. Bottom rails to be fully enclosed to prevent contact of tapes and
sill at underside.
5. //In lobbies, bottom rails and head boxes to be aluminum. //
6. Finish concealed metal work of head-rails including concealed
mechanism, with one shop coat of paint. Do not paint parts that have
non-rusting finish, or parts where motion of friction occurs.
D. Vertical Blinds: Traversing type with rotating louvers positioned
between window head and sill rails, and including hardware, brackets,
anchors, fastenings and accessories.
1. Provide one piece, extruded aluminum head and sill rails, full
length with capped ends.
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a. Provide manufacturer's standard finish for concealed surfaces.
b. Match finish on windows for exposed surfaces.
2. Provide carrier trucks for head and sill rails for each louver
blade, with two, aluminum or steel, ball bearing wheels, mounted on
acetal resin axles.
3. Louvers to be held fixed until reset by control.
4. Stainless steel, full hard, flexible spacer links to space and
stabilize each truck by passing smoothly between stabilizer guides
on each truck; no glides or sliders not allowed.
5. Louvers to traverse at any angle without binding.
6. Louvers to be kept taut between head and sill rails with a minimum
of one to a maximum of 1 Kg (2-1/2 pounds) of spring tension.
7. Traversing to be split draw and accomplished by an anodized
aluminum, spiral lead screw extending the full length of the
channel, actuating a lead nut, and controlled by a nickel plated
brass or stainless steel bead chain; blinds must pack when traversed
to not more than 11 mm (7/16-inch) per louver plus space for end
caps and end spacer tubes.
8. Louvers to overlap not less than 9 mm (3/8-inch).
9. Louvers to operate manually in opposite direction from normal
traverse, and end louver must be firmly fixed by a friction spacer
or anti-creep pin.
PART 3 - EXECUTION
3.1 INSTALLATION
A. Cloth Window Shades: Mount window shades on end of face brackets, set
on metal gussets, or casing of windows as required. Provide extension
face brackets where necessary at mullions. // In existing buildings,
provide brackets similar to those on existing windows.//
1. Locate rollers in level position as high as practicable at heads of
windows to prevent infiltration of light over rollers.
2. Where extension brackets are necessary, on mullions or elsewhere,
for alignment of shades, provide metal lugs, and rigidly anchor lugs
and brackets.
3. Place brackets and rollers so that shades will not interfere with
window and screen hardware.
4. //Mount shades at wire mesh window guards on head rails of hinged
frame. //
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5. //Mount shades at detention, or protection screens on head rail
(room side) of hinged frame, with face brackets located
approximately 38 mm (1-1/2 inches) from outside edges. //
6. Shade installation methods not specifically described, are subject
to approval of RE/COR.
B. Venetian Blinds: Support blinds in level position by brackets and
intermediate supports that will permit easy removal and replacement of
units without damage to blind, or adjacent surfaces. Provide at least
two fasteners for each bracket or other support.
1. Install blinds between jambs on window openings with steel trim.
Mount brackets on trim reveal, flush with face of trim and secure
with steel screws.
2. Install blinds between jambs on window openings with wood trim.
Mount brackets on trim or on wood plaster-mold set against plaster
or other wall finish, and secure in place with screws.
3. Mount brackets and intermediate supports of lobby blinds on face of
trim members, and secure with stainless steel standard tap or
thread-forming machine screws, or by cadmium-plated molley or toggle
bolts. Penetrate through and lock screws and bolts behind steel
sub-frame.
4. Where blinds abut glass partitions of Vestibules, extend head rails
to trim at head of partition frame with slats sufficiently long to
clear transom bars.
5. Provide one brush (for each 1 to 50 blind) of an approved type,
suitable for cleaning blinds.
C. Vertical Blinds:
1. Support blinds in level position that will permit easy removal and
replacement of units without damage to blind or adjacent surfaces.
2. Provide at least one fastener for each 500 mm (20 inches) of width,
with end screws maximum of 75 mm (three inches) from end.
3. Protect vertical blinds against defacements, warpage of slats, or
bending of rails. Remove and replace warped or damaged slats, or
bent rails.
4. Repair scratches or other defacements at the Contractor's expense
and as approved by the RE/COR.
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